update

modules/pshowsso/vendor/paragonie/random-lib/lib/RandomLib/AbstractMcryptMixer.php

@@ -0,0 +1,181 @@
+<?php
+
+/*
+ * The RandomLib library for securely generating random numbers and strings in PHP
+ *
+ * @author     Anthony Ferrara <ircmaxell@ircmaxell.com>
+ * @copyright  2011 The Authors
+ * @license    http://www.opensource.org/licenses/mit-license.html  MIT License
+ * @version    Build @@version@@
+ */
+/**
+ * The Mcrypt abstract mixer class
+ *
+ * PHP version 5.3
+ *
+ * @category   PHPCryptLib
+ * @package    Random
+ * @subpackage Mixer
+ *
+ * @author     Anthony Ferrara <ircmaxell@ircmaxell.com>
+ * @author     Paragon Initiative Enterprises <security@paragonie.com>
+ * @copyright  2013 The Authors
+ * @license    http://www.opensource.org/licenses/mit-license.html  MIT License
+ *
+ * @version    Build @@version@@
+ */
+namespace RandomLib;
+
+/**
+ * The mcrypt abstract mixer class
+ *
+ * @category   PHPCryptLib
+ * @package    Random
+ * @subpackage Mixer
+ *
+ * @author     Anthony Ferrara <ircmaxell@ircmaxell.com>
+ * @author     Chris Smith <chris@cs278.org>
+ * @author     Paragon Initiative Enterprises <security@paragonie.com>
+ */
+abstract class AbstractMcryptMixer extends \RandomLib\AbstractMixer
+{
+    /**
+     * mcrypt module resource
+     *
+     * @var resource
+     */
+    private $mcrypt;
+    /**
+     * Block size of cipher
+     *
+     * @var int
+     */
+    private $blockSize;
+    /**
+     * Cipher initialization vector
+     *
+     * @var string
+     */
+    private $initv;
+    /**
+     * {@inheritdoc}
+     */
+    public static function test()
+    {
+        return extension_loaded('mcrypt');
+    }
+    /**
+     * @return bool
+     */
+    public static function advisable()
+    {
+        return static::test() && \PHP_VERSION_ID < 70100;
+    }
+    /**
+     * Construct mcrypt mixer
+     * @psalm-suppress UndefinedConstant
+     */
+    public function __construct()
+    {
+        $this->mcrypt = mcrypt_module_open($this->getCipher(), '', (string) \MCRYPT_MODE_ECB, '');
+        $this->blockSize = mcrypt_enc_get_block_size($this->mcrypt);
+        $this->initv = str_repeat(chr(0), mcrypt_enc_get_iv_size($this->mcrypt));
+    }
+    /**
+     * Performs cleanup
+     */
+    public function __destruct()
+    {
+        if ($this->mcrypt) {
+            mcrypt_module_close($this->mcrypt);
+        }
+    }
+    /**
+     * Fetch the cipher for mcrypt.
+     *
+     * @return string
+     */
+    abstract protected function getCipher();
+    /**
+     * {@inheritdoc}
+     */
+    protected function getPartSize()
+    {
+        return $this->blockSize;
+    }
+    /**
+     * {@inheritdoc}
+     */
+    protected function mixParts1($part1, $part2)
+    {
+        if (!\is_string($part1)) {
+            throw new \InvalidArgumentException('Expected a string');
+        }
+        if (!\is_string($part2)) {
+            throw new \InvalidArgumentException('Expected a string');
+        }
+        return $this->encryptBlock($part1, $part2);
+    }
+    /**
+     * {@inheritdoc}
+     */
+    protected function mixParts2($part1, $part2)
+    {
+        if (!\is_string($part1)) {
+            throw new \InvalidArgumentException('Expected a string');
+        }
+        if (!\is_string($part2)) {
+            throw new \InvalidArgumentException('Expected a string');
+        }
+        return $this->decryptBlock($part2, $part1);
+    }
+    /**
+     * Encrypts a block using the suppied key
+     *
+     * @param string $input Plaintext to encrypt
+     * @param string $key   Encryption key
+     *
+     * @return string Resulting ciphertext
+     */
+    private function encryptBlock($input, $key)
+    {
+        if (!$input && !$key) {
+            return '';
+        }
+        $this->prepareCipher($key);
+        $result = mcrypt_generic($this->mcrypt, $input);
+        mcrypt_generic_deinit($this->mcrypt);
+        return $result;
+    }
+    /**
+     * Derypts a block using the suppied key
+     *
+     * @param string $input Ciphertext to decrypt
+     * @param string $key   Encryption key
+     *
+     * @return string Resulting plaintext
+     */
+    private function decryptBlock($input, $key)
+    {
+        if (!$input && !$key) {
+            return '';
+        }
+        $this->prepareCipher($key);
+        $result = mdecrypt_generic($this->mcrypt, $input);
+        mcrypt_generic_deinit($this->mcrypt);
+        return $result;
+    }
+    /**
+     * Sets up the mcrypt module
+     *
+     * @param string $key
+     *
+     * @return void
+     */
+    private function prepareCipher($key)
+    {
+        if (0 !== mcrypt_generic_init($this->mcrypt, $key, $this->initv)) {
+            throw new \RuntimeException('Failed to prepare mcrypt module');
+        }
+    }
+}